Emerson 3000 Section Troubleshooting, World Class, 6-1OVERVIEW, b.Electrical Noise

World Class 3000

Instruction Manual

IB-106-300NH Rev. 4.3 May 2005

SECTION 6

TROUBLESHOOTING

6-1 OVERVIEW

The system troubleshooting describes how to identify and isolate faults which may develop in the Oxygen Analyzer System. Refer to Probe, IFT, HPS, MPS, and HART Communicator appendices.

Install all protective equipment covers and safety ground leads after trouble- shooting. Failure to replace covers and ground leads could result in seri- ous injury or death.

6-2 SPECIAL TROUBLESHOOTING NOTES

a.Grounding

It is essential that adequate grounding pre- cautions are taken when the system is be- ing installed. A very thorough check must be made at both the probe and electronics to ensure that the grounding quality has not degraded during fault finding. The system provides facilities for 100% effective grounding and the total elimination of ground loops.

b.Electrical Noise

sion circuits are employed on all field termi- nations and main inputs. When fault finding, the electrical noise being generated in the immediate circuitry of a faulty system should be evaluated. All cable shields must be connected to earth.

c.Loose Integrated Circuits

The IFT uses a microprocessor and sup- porting integrated circuits. Should the elec- tronics unit receive rough handling during installation in a location where it is sub- jected to severe vibration, an Integrated Circuit (IC) could work loose. The fault find- ing guides in paragraph 6-3 and Table E-2 in Appendix E, show the resulting variety of failure modes. It is recommended that all IC's be confirmed to be fully seated before troubleshooting on the system begins.

d.Electrostatic Discharge

Electrostatic discharge can damage the IC's used in the electronics unit. It is essential that the user ensure he/she is at ground potential before removing or handling the processor board or the IC's used on it.

6-3 SYSTEM TROUBLESHOOTING

The IFT has been designed to operate in the type of environment normally found in a boiler room or control room. Noise suppres-

The status line of the GUI equipped IFT will dis- play one of ten conditions. The system status displays will be displayed one at a time in prior- ity sequence, as indicated in Table 6-1.

Rosemount Analytical Inc. A Division of Emerson Process Management Troubleshooting 6-1